A single-file Access database forces every user to open forms, reports, and tables from one .accdb on the network. That creates locking conflicts, slow opens, and higher corruption risk. Splitting separates data tables (back-end) from everything else (front-end). After 20+ years fixing multi-user Access systems, I split almost every database over five users.
Why Split an Access Database?
A single-file Access database forces every user to open forms, reports, and tables from one .accdb on the network. That creates locking conflicts, slow opens, and higher corruption risk. Splitting separates data tables (back-end) from everything else (front-end). After 20+ years fixing multi-user Access systems, I split almost every database over five users.
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What You Need Before You Start
Back up the file. Confirm you have full Access (not Runtime only) for the split wizard. Document linked tables if you already use external data. Pick a network folder for the back-end that all users can read/write, with nightly backups.
- Full backup of the current .accdb
- Network path for back-end tables (e.g. \\server\data\)
- Local or synced folder for each user front-end
- List of users and who needs design changes
Using the Database Splitter Wizard
In Access: Database Tools → Access Database → Split Database. Point to your back-end folder. Access moves tables and leaves linked table icons in the front-end. Test relinking from a second PC before rolling out to the team.
After the Split: Settings That Matter
Set the front-end to open a startup form, disable bypass key in production if needed, and use record-level locking (Edited Record, not All Records). Compact and repair the back-end on a schedule, not during business hours.
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When Splitting Is Not Enough
If you still hit corruption, 2GB limits, or 30+ concurrent users, SQL Server back-end or full migration may be the next step. Splitting fixes architecture; it does not add unlimited scale.
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Next Step
Book a free consultation or request a fixed-price estimate for your Access database.